CN1435616A

CN1435616A - Defrosting device for evaporator of electric refrigerator

Info

Publication number: CN1435616A
Application number: CN 02100784
Authority: CN
Inventors: 朴镛硕
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: Taizhou LG Electronics Refrigeration Co Ltd
Priority date: 2002-01-29
Filing date: 2002-01-29
Publication date: 2003-08-13
Anticipated expiration: 2022-01-29
Also published as: CN1176341C

Abstract

A defroster for evaporator of electric refrigerator is characterized by that the circulating pipe whose entrance and exit are connected to mechanical chamber passes through the heat exchanger with evaporator in it and its entrance has an exhaust fan. Its advantage is use of the heat generated in mechanical chamber to remove frost.

Description

The defroster of evaporator of electric refrigerator

Technical field

The present invention relates to refrigerator, particularly be the defroster of evaporator of electric refrigerator.

Background technology

Refrigerator (hereinafter to be referred as refrigerator) is to provide cold air to storeroom, so that the food in the storeroom is kept the freezing machine of uniform temperature.Refrigerator cold air is produced by kind of refrigeration cycle.Kind of refrigeration cycle is by compressor gaseous coolant to be compressed, condenser condenses into liquid state with the refrigerant of gaseous state, through capillary the high-pressure liquid refrigerant in the condenser is become the low-pressure liquid refrigerant, behind the heat in the evaporimeter liquid refrigerants absorption refrigerator storeroom that relative temperature is low, become gaseous coolant again.Refrigerant in above-mentioned phase transition process with refrigerator storeroom in air carry out heat exchange, thereby make storeroom cooling.

Fig. 1 is the defroster structural representation of existing evaporator of electric refrigerator.As shown in Figure 1, in the inside of refrigerator body 2 storeroom 4 is arranged.Dividing plate 14 and fence 16 separate the refrigerant pipe 12 that has spacing in accordance with regulations to be bent to form on the evaporimeter 10 with evaporimeter 10 and storeroom 4.There is the delivery outlet 15a that cold air is sent into storeroom 4 dividing plate 14 upper ends, and its lower end has the cold air that makes after storeroom 4 inner loop to get back to the suction inlet 15b of evaporimeter 10 downsides.Refrigerator body 2 downsides are Machine Rooms 20, and the refrigerator necessary various parts that turn round are housed in Machine Room 20, as compressor 22, condenser and defrosting drainage duct 26.The hot gas that produces in the downside of refrigerator body 2 also has Machine Room 20 guides to the guiding channel 30 of 10 li in evaporimeter.Guiding channel 30 is positioned at the inwall of refrigerator body 2, and the inlet of guiding channel 30 is equipped with circulating fan 32.The thermal source that produces hot gas in the Machine Room 20 comes from parts such as compressor 22 or condenser.Rotating switch 34 is housed in the front of dividing plate 14.There is the motor 36 that drives its rotation in the central authorities of switch 34, switch 34 two ends have with dividing plate 14 on size shape corresponding delivery outlet closure plate 35a and the suction inlet closure plate 35b of delivery outlet 15a and suction inlet 15b.

Course of action to above-mentioned prior art evaporator defrost device describes below: after the refrigerator kind of refrigeration cycle begins, when the refrigerant that relative temperature is lower flows in the refrigerant pipe 12 of evaporimeter 10, make air and refrigerant in the evaporimeter 10 carry out heat exchange, thereby produce cold air.Cold air through dividing plate 14 delivery outlet 15a and fence 16, is sent to storeroom 4 under Air Blast fan drives.Cold air carries out heat exchange with institute's foodstuff storing in storeroom 4, temperature increases, and Quilt with air conditioning that contain humidity higher when temperature is sent to the lower refrigerant pipe of relative temperature 12 places, forms dewdrop in its surface.Through behind the certain hour, described dewdrop can become ice.Reduced the heat exchanger effectiveness between refrigerant pipe 12 interior refrigerants and the air outside, also reduced flow air amount between refrigerant pipe 12, kind of refrigeration cycle has been had a negative impact.Therefore, be necessary periodically to remove ice on the refrigerant pipe 12.The process of removing ice is the defrosting running.Defrosting running is by circulating fan 32, and the hot gas in the Machine Room 20 is sent to the upside of evaporimeter 10 by guiding channel 30, and evaporimeter 10 lip-deep ice are melted.The water that is melted is sent in the defrosting basin 24 of Machine Room 20 by drainage duct 26.When the defrosting running, the driving switch 34 of motor 36 is pressed the direction of arrow rotation among Fig. 2, makes delivery outlet closure plate 35a sealing delivery outlet 15a, suction inlet closure plate 35b sealing suction inlet 15b; To prevent that hot gas is recycled fan 32 drivings and is delivered to storeroom 4.But, above-mentioned prior art has the following disadvantages: at first, in defrost process, the ice that is attached on the refrigerant pipe 12 can not be melted into water fully, and mix a part of ice cube, when frozen water flows into drainage duct 26, can cause drainage duct 26 to be blocked, the hot gas flow channel that is directed in the circulating fan driving device chambers 20 32 is not smooth, and defrosting effect is bad.Secondly, the high temperature air that the Machine Room produces be uniformly dispersing in evaporimeter 10, and can not concentrate on the refrigerant pipe 12.Reduce defrosting effect.At last, the Defrost method of prior art, the switch 34 and the drive motors 36 thereof of need configuration enclosed baffle 14 make complex structure, and cost improves.

Summary of the invention

The objective of the invention is to overcome above-mentioned technical deficiency, provide the circulation conduit that high temperature air is communicated with in a kind of and the Machine Room contact, utilize heat conduction to defrost, make the air on the evaporimeter mobile more unobstructed, have the defroster of fine defrosting effect with refrigerant pipe.

The technical solution adopted for the present invention to solve the technical problems is: a kind of defroster of evaporator of electric refrigerator, the arrival end of circulation conduit is connected with the Machine Room in this defroster, after the circulation conduit remainder passed its inside the heat exchange case of evaporimeter is housed, its port of export was connected with the Machine Room; The discharge outlet of heat exchange case lower end drainage duct is positioned at inner thaw dripping laver top, Machine Room; In the circulation conduit arrival end ventilating fan is housed.

Circulation conduit in heat exchange case passes evaporimeter.Circulation conduit contacts with the refrigerant pipe of evaporimeter.Circulation conduit contacts with the refrigerant pipe of bending at a certain distance.

Beneficial effect of the present invention is: the present invention is the hot gas defrosting that utilizes the Machine Room inner part to produce, and does not establish thermal source, power saving in addition.The hot gas of defrosting running only moves in circulation conduit, makes defrosting running hot gas cycle more unobstructed.Circulation conduit contacts with the refrigerant conduit of evaporimeter, reduces thermal loss, has good defrosting effect.Need not establish switch and the drive motors thereof of blocking dividing plate in addition, reduce number of spare parts, reduce cost.

Description of drawings

Fig. 1 is existing evaporator defrost apparatus structure generalized section;

Fig. 2 is 34 schematic diagrames of the switch on the refrigerator shelf 14 among Fig. 1;

Fig. 3 is refrigerator shelf 14 schematic diagrames of the present invention;

Fig. 4 is a structural profile schematic diagram of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing embodiments of the invention are further specified: shown in Fig. 3,4, storeroom 4 is arranged in refrigerator body 2.Storeroom 4 is kept certain temperature by the cold air that produces in the kind of refrigeration cycle.

Dividing plate 14 and fence 16 separate storeroom 4 and evaporimeter 10, have to be bent to form the inner refrigerant pipe 12 that has refrigerant to flow at a certain distance on the rear end of storeroom 4 evaporimeter 10.The delivery outlet 15a of the oriented storeroom 4 output cold air in dividing plate 14 upper ends, its lower end has cold air to turn back to the suction inlet 15b of evaporimeter 10 lower ends.

The downside of refrigerator body 2 is Machine Rooms 20.The refrigerator parts such as necessary compressor 22, condenser (not shown) and white basin 24 that turn round are housed in the Machine Room 20.

The discharge outlet of the drainage duct 26 of heat exchange case 61 lower ends is positioned at 20 inner thaw dripping lavers, 24 tops, Machine Room.The arrival end of circulation conduit 80 is connected with Machine Room 20, and circulation conduit 80 remainders pass in refrigerator body 2 walls and the heat exchange case 61 of evaporimeter 10 is equipped with in its inside, and contacts with the crooked at a certain distance refrigerated medium pipeline 12 of evaporimeter 10.The port of export of circulation conduit 80 is connected with Machine Room 20, the hot gas that Machine Room 20 produces, guide to heat exchange case 61 by circulation conduit 80 after, get back to Machine Room 20 again, and form a closed loop gas circuit.Circulation conduit 80 prevents that not only the hot gas in the Machine Room 20 from spreading in heat exchange case 61, also make concentrated refrigerant pipe 12 places that deliver to of heat of circulation conduit 80 inside.Circulating fan 82 is housed in the arrival end of circulation conduit 80, and fan 82 is sent into the hot gas that produces in the Machine Room 20 in the circulation conduit 80.

Defrosting operation process with refrigerator of the present invention describes below: the process of on the refrigerant pipe 12 of evaporimeter 10, freezing, and identical with the background technology explanation, in this omission.Under the driving of circulating fan 82, the hot gas that produces in the Machine Room 20 is admitted in the circulation conduit 80.Circulation conduit 80 passes the mode of evaporimeter 10, can be to pass between the refrigerant pipe 12 of evaporimeter 10; Also can be to contact with refrigerant conduit 12, circulation conduit 80 can also vertically contact with crooked at a certain distance refrigerant pipe 12.By contact, the heat of high temperature in the circulation conduit 80 is delivered on the refrigerant pipe 12 with heat-conducting mode, and the ice on the refrigerant pipe 12 can dissolve into water.If the material of refrigerant pipe 12 and circulation conduit 80 is all selected the metal material of good heat conductivity, then removing the effect of icing on the pipe surface can be better.Ice dissolves Cheng Shuihou and is discharged in the white basin 24 by drainage duct 26.Because the high temperature hot gas in the Machine Room 20 is circulation in circulation conduit 80, and the driving of circulating fan is arranged again, can more effectively remove icing.

Hot gas of the present invention only moves in circulation conduit, can not be delivered to the storeroom 4 of refrigerator, therefore, need not establish switch and the motor thereof of blocking dividing plate in addition.Because circulation conduit 80 vertically contacts with refrigerant pipe, can the circulating cold air from evaporimeter 10 not exerted an influence.Therefore, also can not influence the efficient of evaporimeter.Melt the hot gas that freezes on the refrigerant pipe 12, become low temperature after, turn back to Machine Room 20.Become high temperature air once more by the heat release parts in the Machine Room 20 then, can finish the thermal cycle process repeatedly by circulation conduit 80.

Have defroster of the present invention, in the refrigerator of evaporimeter 10, more can play a role near Machine Room 20.This is that the catheter fever loss is more little because the length of the near more circulation conduit 80 of distance of evaporimeter 10 and Machine Room 20 also shortens, and the icing effect of removing on the refrigerant pipe 12 is good more; The conduit weak point can also reduce cost.

Claims

1. the defroster of an evaporator of electric refrigerator, the arrival end that it is characterized in that circulation conduit in this defroster (80) is connected with Machine Room (20), after circulation conduit (80) remainder passed its inside the heat exchange case of evaporimeter (10) (61) is housed, its port of export was connected with Machine Room (20); The discharge outlet of heat exchange case (61) lower end drainage duct (26) is positioned at Machine Room (20) inner thaw dripping laver (24) top; In circulation conduit (80) arrival end ventilating fan (82) is housed.

2. according to the device described in the claim 1, it is characterized in that the circulation conduit (80) in heat exchange case (61) passes evaporimeter (10).

3. according to the device described in the claim 2, it is characterized in that circulation conduit (80) contacts with the refrigerant pipe (12) of evaporimeter (10).

4. according to the device described in the claim 3, it is characterized in that circulation conduit (80) contacts with the refrigerant pipe (12) of bending at a certain distance.